(5)
On the refuel/defuel panel 800VU:
(a)
Put the REFUEL VALVES switches to the NORM and guarded position.
(b)
Put the MODE SELECT switch to the OFF and guarded position. Make sure that the OPEN light goes off.
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B. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the access door 192MB. Subtask 28-25-00-862-052
C. De-energize the Electrical Circuits
(1) De-energize the aircraft electrical network (Ref. TASK 24-41-00-862-002).
Subtask 28-25-00-942-054
D. Removal of Equipment
(1)
Remove the safety barriers.
(2)
Remove the warning notice(s).
(3)
Remove the access platform(s).
(4)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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To Drain Remaining Fuel from the Wing Tanks and the Center Tank
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______ START A TASK ON OR NEAR:
-
THE FLIGHT CONTROLS
-
THE FLIGHT CONTROL SURFACES
-
THE LANDING GEAR AND THE RELATED DOORS
-COMPONENTS THAT MOVE.
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
WARNING : DO NOT SPILL FUEL ON THE ENGINES OR THE BRAKES. IF YOU SPILL FUEL ON
_______ ENGINES OR BRAKES THAT ARE HOT, IT CAN CAUSE FIRES.
1. Reason for the Job
__________________
To drain remaining fuel with Tool 97A28002117002 (wing tanks and center tank) or with Tool 98A28104000002 (center tank only). To drain remaining fuel with Tool 98A28203000000, Ref. TASK 28-25-00-650-00301.
NOTE : If you do this procedure regularly it can prevent microbiological
____
contamination of the fuel tanks.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific hot-air blower No specific safety barriers No specific warning notices 97A28002117002 1 PURGING TOOL 98A28104000002 1 WATER DRAIN PURGER
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B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
28-00-00-910-001 Fuel Safety Procedures
32-00-00-481-001 Installation of the Safety Devices on the Landing Gears
28-25-00-991-001 Fig. 301
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
28-25-00-991-062 Fig. 305
**ON A/C 301-399,
28-25-00-991-062-A Fig. 305A
**ON A/C ALL
3. Job Set-up
__________
(Ref. Fig. 301/TASK 28-25-00-991-001)
Subtask 28-25-00-941-053-A
A. Safety Precautions
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
(1)
You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.
(2)
Put the safety barriers in position.
(3)
Make sure that the ground safety locks are installed on the landing gear (Ref. TASK 32-00-00-481-001).
(4)
On the panel 400VU:
-make sure that the landing-gear control-lever 6GA is in the DOWN position
-put a warning notice in position to tell persons not to operate the landing gear.
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(5)
Put warning notices in position to tell persons not to operate the landing gear doors.
(6)
If the fuel temperature is less than -5 DEG.C (+23.00 DEG.F) and/or the water drain valves are frozen, heat the drain valve areas with an approved hot-air blower.
NOTE : Do not apply unusually high force to open the water drain
____
valve.
Subtask 28-25-00-010-070-A
B. Get Access
(1) For access to the center tank water drain valves, open the applicable access panels:
-
for water drain valve 94QM, open access panel 195BB
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